Bobbin form for windings and the like



Jan. 18, 1944. w F, s-r 2,339,432

BOBBIN FORM FOR WINDINGS AND THE LIKE Filed NOV. 6, 1941 if a 54 Patented Jan. 18, 1944 BOBBIN FORM FOR WINDINGS AND THE LIKE William F. Stahl, Evanston, Ill. Application November 6, 1941, Serial No. 417,981

7 Claims.

This invention relates to a bobbin form for windings and the like and more particularly to a form having end flanges equipped with bosses thereon, the bosses being adapted to provide an outlet for electrical connections and the like from from the winding on the form.

An object of the invention is to provide a core equipped with outwardly extending flanges, the form being adapted to be supported upon the end thereof and being equipped with an outlet for electrical connections. Another object is to provide in a bobbin form forward and rear flanges on the ends thereof equipped respectively with forwardly struck and rearwardly struck bosses for supporting the form on its ends and for providing grooves on the inner sides of the flanges. Still another object is to provide in a bobbin form, bosses struck in the flanges thereof forming on the inner sides of the flanges grooves which are open at one end.

A further object of the invention is to provide a laminated hollow paper core with the ends thereof outwardly swaged to support outwardly extending flanges, the flanges having boSSes struck therein with the extended portions of the bosses being in the plane of the ends of the core and with the inner sides of the'flanges having grooves formed by the bosses and opening at the outer ends thereof, the grooves being adapted to receive electrical connections from a winding on the core and to provide outlets for such connections.

Other} features and advantages will appear from the following specification and drawing, in

which- Flgure 1 is an end elevational view of a bobbin form having a winding thereon; Fig. 2 is a side elevational view or the form; Fig. 3 is a transverse sectional view taken along the line 33 of Figure 1; Fig. 4 is an end elevational view of a modification of the bobbin form; and Fig. 5 is a side elevational view or the modification shown in Fig. 4.

In the embodiment of the invention described herein and shown particularly in Figs. 1 to 3, the bobbin form includes a hollow laminated paper core I ll having the flanges II and I 2 supported thereon at the forward and rear ends respectively of the core. The flanges II and I2 extend outwardly from the core to provide the ends of the form.

Each of the flanges is equipped with a central aperture which receives the paper core. The end portions l3 and ll of the paper core are swaged outwardly to engage the flanges I I and I2 adjacent the central apertures therein. The outward I swaging of the ends of the core causes a separation of the laminations and thus securely fixes the flanges in position on the core I0. It desired, a suitable hardening varnish lacquer or a synthetic resin, ma be applied to the outwardly swaged ends or the core. The hardening material will the same plane as the adjacent end of the core 10 and thus provide with the end l3 of the core [0 mean for supporting the bobbin upon the forward end thereof.

The bosses I5, I! and I8 are preferably to the central axis of the core [0. The bosses l5, l6, l1 and 18 may be equipped at their outer ends with the apertures I9, 20, 2| and 22 respectively.

by the inner surfaces The rear flange I 2 with a plurality of 23 and 24 are of the bosses. may be similarly provided bosses of which the bosses outer ends thereof.

Each of the flanges should be provided with at least one boss which is struck in an endwise diconnection or wire from the coil carried by'the bobbin to pass along and through the flange.

The modification shown in Figs. 4 and is equipped with a core 29 and with forward and rear flanges 30 and 3| respectively corresponding to the core and flanges shown in the embodiment set forth in Figs. 1 to 3.

The modification shown in Figs. 4 and 5 differs from the construction shown in Figs. 1 to 3 in that the bosses 32 formed in the flanges extend outwardly along the surface of the flange to the outer periphery thereof. In this way, the groove formed on the inner surface of the flange is in each case provided with an open end which permits an electrical connection received within the groove to pass from the bobbin form without extending toward the inner surface of the flange beyond such surface.

In both constructions, the bosses in the forward flange are forwardly struck to provide a groove on the inner side of the flange. In each case, the extended surfaces .of the bosses may be in substantially the same plane to provide a means for supporting the bobbin at that end. The grooves formed on the inner surface of the flange are adapted to receive electrical connections from the coil winding on the bobbin and to permit the connections to pass outwardly along the flange and then beyond the flange without interfering with the winding between the flanges. In other words, the groove in the inner surface of the flange is sufliciently deep to receive the electrical connection and to provide an outlet for this connection which does not interfere with the winding.

Although the invention has been set forth and described in connection with certain specific embodiments it will be obvious that many modifications and changes may be made in the construction shown and described without departing from the spirit of the invention.

I claim:

v 1. A bobbin form for windings and the like, comprising a laminated paper core, flanges supported at the forward and rear ends of the core and extending outwardly therefrom to provide the ends of the form, each of the extreme ends of said core extending slightly beyond the body of the adjacent flange, a plurality of bosses extending forwardly from the forwarli flange and rearwardly from the rear flange, said bosses being disposed from the core towards the outer edges of the flange, and having the extended surfaces thereof in substantially the same plane, said plane being at the end of the form whereby the form may be supported at its end on the extended surfaces of said bosses, the inner side of at least one boss in each flange being depressed to provide a groove in the flange for receiving electrical connections, each of said last-mentioned bosses being equipped with an aperture therein.

2. A bobbin form for windings and the like, comprising a laminated hollow paper core, flanges supported at theforward and rear ends of the core and extending outwardly therefrom, each of the extreme ends of said core extending slightly beyond the body of the adjacent flange, a plurality of bosses radially disposed in each flange with respect to the axis of the core, said bosses extending forwardly from the forward flange and rearwardly from the rear flange with the extended surfaces of the bosses in each flange being in substantially the same plane, said plane being at the end of the form whereby the form may be supported at its end on the extended surfaces of said bosses, the inner side of at least one boss in each flange being depressed to provide a groove in the flange for receiving electrical connections, each of said last-mentioned bosses being equipped with an aperture therein adjacent the edge of the flange.

3. A bobbin form for windings and the like, comprising a laminated hollow paper core, a pair of flanges supported at the ends of said core and extending outwardly therefrom, said flanges being engaged by outwardly swaged end portions of the core, each of the extreme ends of said core extending slightly beyond the body of the adjacent flange, a plurality of forwardly struck bosses on the forward flange, and a plurality of rearwardly struck bosses on the rear flange, the bosses being radially disposed from the core towards the outer edge of the flange, the extended surfaces of the bosses on each flange being in substantially the same plane, said plane being at the end of the form whereby the form may be supported at its end on the extended surfaces of said bosses, each boss providing a groove on the inner side of the flange for receiving the electrical connections, and each of said bosses being provided with an aperture at the end thereof adjacent the periphery of the flange adapted to permit an electrical connection to extend forwardly from the forward flange and rearwardly from the rear flange.

4. A bobbin form for windings and the like, comprising a core, flanges supported at the forward and rear ends of the core and extending outwardly therefrom to provide the ends of the form, and a plurality of bosses extending forwardly from the forward flange and rearwardly from the rear flange, each of said bosses being disposed outwardly along the flange to the outer edge thereof and providing a groove in the flange open at the outer end, the extended surfaces of the bosses in each flange being in substantially the same plane and the plane being at the end of the form whereby the form may be supported at its end on the extended surfaces of said bosses.

5. A bobbin form for windings and the like. comprising a laminated hollow paper core, flanges supported at the forward and rear ends of said core and extending outwardly therefrom, and a plurality of bosses extending forwardly from the forward flange and rearwardly from the rear flange, each of said bosses being disposed radially with respect to the axis of the core and running outwardly to the periphery of the flange, the inner side of each of the bosses being depressed to provide a groove in the inner side of the flange open at the outer end, the extended surfaces of the bosses in each flange being in substantially the same plane and the plane being at the end of the form whereby the form may be supported at its end on the extended surfaces of said bosses.

6. A bobbin form for windings and the like,

comprising a laminated hollow paper core, a pair of flanges supported at the forward and rear ends of the core respectively and extending outwardly therefrom, said flanges being engaged by outwardly swaged end portions of the core, a plurality of radially disposed forwardly-struck bosses on the forward flange with the forward surfaces of the bosses being in substantially the same plane, said plane being at the end of the form whereby the form may be supported at its end on the extended surfaces of said bosses, and a plurality of radially disposed rearwardly-struck bosses on the rear flange with the rear surfaces and extending outwardly therefrom to provide 10 videa groove in the flange for receiving electrical 

